WHY DID THE DAM BURST?In 1928 the St. Francis Dam collapsed, drowning 500 people. Was its designer, William Mulholland, to blame? The answer is far from clear. by Kermit Pattison
THE STRANGE TRIUMPH OF ABNER DOBLEInternal combustion almost completely replaced steam by 1910. Two decades later, one stubborn car builder still refused to concede defeat. by Stephen Fox
SEEING IN THE DARKToday’s military does business 24 hours a day with night-vision devices that have shrunk from salami-sized tubes to disks as small as a quarter. by Tom Gibson
THE SCIENCE OF CHEATING AT CARDSFew areas of life have inspired so much inventiveness as the endless effort to remove the vagaries of chance from gambling. by Gary R. Brown
| 
